Not looking for specific tech info. Just food for thought. What is your main motivation when choosing an engine &/or drivetrane pack. What are you guys using now? I can pump a lot of gas through a worn out big block for the cost of modern effecient engine. I alsol don't like spending a paycheck on gas for a fun day run. What are your considerations? Budget ... MPG ... Power ... vintage ... neet-o factor? What compromises are you making?